Improvement in shuttle-box mechanisms for looms



M. A. FB RBUSH.

Shuttle Box Mechanisms for Looms.

Patented Aug.1, 1874.

TNE GRAPHIC C0-FHOT0'LITH-39L 4-! PAF iK PLACE, ILY.

UNITED STATES PATENT, QFFICE.

MERRILL A. FUEBUSH, 0E PHILADELPHIA, PENNSYLVANIA, AssIeNon T0 HIMSELFAND 0. A. FURBUSH, OF SAME PLAoE.

IMPROVEMENT IN SHUTTLE-BOX MECHANISMS FOR LOOMS.

Specificatlon forming part of Letters Patent No. 154,23, dated August18, 1874; application filed July 25., 1874.

To all whom it may concern:

Be it known that I, MERRILL A. FORBUSH,-

tion, D, (fully described hereafter,) so that the said boxesshallb'epositively lowered, as well as raised, by thelever, and yet becapable of yielding should any obstruction be offered to their freemovement. (See elevations, Figs. 1 and 2 of the accompanying drawing.) Erepresents one of the side frames of a loom, to which the weighteddrop-box lever B is hung at the point a, a vibrating movement beingimparted to the said lever from the cam-shaft F, through the medium ofan anchor-lever, H, and devices connected therewith, which are of acharacter so well known as to render minute description unnecessary.

In ordinary drop-box looms the arm b of the lever B is connectedto andimparts a reciprocating movement to a vertical rod having an enlargementor shelf at its upper end, upon which the Shuttle-boxes A simply rest,without being secured thereto. The connection between the lever and rodd is such as to. permit the latter and the boxes to yield should thesaid boxes meet with any obstruction durin g their upwardmovement, whilethe rod can descend Without the boxes should the latter meet with anyobstruction during their downward movement.

This arrangement answers well for some classes of weaving, but preventsthe attainment of a very high speed, for, as the boxes descend bygravity alone, their movement must be comparatively slow-an objectionwhich I overcome by drawing the said boxes downward, as well as forcingthem upward, by positive mechanism. which will permit them to yield whennecessary in either direction.

The boxes A are permanently secured to a vertical rod, d, guided by andarranged to slide freely through projections e and e on the frame of theloom. On this rod is wound a spiral spring, f, by the action of whichtwo slides, h and h, which also embrace the rod,

'aremai-ntained in contact with fixed collars t and t on the latter, asshown in Fig. I. These slides are also adapted to slots jj in a plate,k, which is connected, by a link, m, to the arm hot the drop-box lever.

The spring f is of sufficient strength. to maintain the slides hand h atthe ends of the slots in the plate It and against the shoulders of therod (1, so that the shuttle-boxes A must be positively lowered, as wellas raised, by the lever B, during the ordinary working of the loom atany required rate of speed; but if the said boxes should meet with anobstruction during their downward movement the spring f will yield andpermit the descent ot' the plate It and slide h, while the rod-djslideh, and boxes remain stationary, and if the obstruction should occurduring the ascent of the boxes the movementof the latter would,

in like manner, be stopped, but the spring would be compressed from itsopposite end by the slide it, which would continue to rise with theplate It, as shown in Fig. 2.

I claim as my invention The combination, substantiallyas described, I

of a double-acting spring-connection, D, with a series of shuttle-boxes,A, and their operat ing-lever B, for the purpose specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

M. A. FUBBUSH.

Witnesses:

WM. A. STEEL, HUDERT HowSoN.

